1#!/usr/bin/perl -w
2# This tool is copyright (c) 2005, Matthias Urlichs.
4# It is released under the Gnu Public License, version 2.
5#
6# The basic idea is to aggregate CVS check-ins into related changes.
7# Fortunately, "cvsps" does that for us; all we have to do is to parse
8# its output.
9#
10# Checking out the files is done by a single long-running CVS connection
11# / server process.
12#
13# The head revision is on branch "origin" by default.
14# You can change that with the '-o' option.
15use strict;
17use warnings;
18use Getopt::Std;
19use File::Path qw(mkpath);
20use File::Basename qw(basename dirname);
21use Time::Local;
22use IO::Socket;
23use IO::Pipe;
24use POSIX qw(strftime dup2);
25$SIG{'PIPE'}="IGNORE";
27$ENV{'TZ'}="UTC";
28our($opt_h,$opt_o,$opt_v,$opt_d,$opt_p,$opt_C);
30sub usage() {
32 print STDERR <<END;
33Usage: ${\basename $0} # fetch/update GIT from CVS
34 [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
35 [ -p opts-for-cvsps ] [ -C GIT_repository ]
36 [ CVS_module ]
37END
38 exit(1);
39}
40getopts("hqvo:d:p:C:") or usage();
42usage if $opt_h;
43@ARGV <= 1 or usage();
45if($opt_d) {
47 $ENV{"CVSROOT"} = $opt_d;
48} elsif(-f 'CVS/Root') {
49 open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
50 $opt_d = <$f>;
51 chomp $opt_d;
52 close $f;
53 $ENV{"CVSROOT"} = $opt_d;
54} elsif($ENV{"CVSROOT"}) {
55 $opt_d = $ENV{"CVSROOT"};
56} else {
57 die "CVSROOT needs to be set";
58}
59$opt_o ||= "origin";
60my $git_tree = $opt_C;
61$git_tree ||= ".";
62my $cvs_tree;
64if ($#ARGV == 0) {
65 $cvs_tree = $ARGV[0];
66} elsif (-f 'CVS/Repository') {
67 open my $f, '<', 'CVS/Repository' or
68 die 'Failed to open CVS/Repository';
69 $cvs_tree = <$f>;
70 chomp $cvs_tree;
71 close $f
72} else {
73 usage();
74}
75select(STDERR); $|=1; select(STDOUT);
77package CVSconn;
80# Basic CVS dialog.
81# We're only interested in connecting and downloading, so ...
82use POSIX qw(strftime dup2);
84sub new {
86 my($what,$repo,$subdir) = @_;
87 $what=ref($what) if ref($what);
88 my $self = {};
90 $self->{'buffer'} = "";
91 bless($self,$what);
92 $repo =~ s#/+$##;
94 $self->{'fullrep'} = $repo;
95 $self->conn();
96 $self->{'subdir'} = $subdir;
98 $self->{'lines'} = undef;
99 return $self;
101}
102sub conn {
104 my $self = shift;
105 my $repo = $self->{'fullrep'};
106 if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
107 my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
108 $user="anonymous" unless defined $user;
109 my $rr2 = "-";
110 unless($port) {
111 $rr2 = ":pserver:$user\@$serv:$repo";
112 $port=2401;
113 }
114 my $rr = ":pserver:$user\@$serv:$port$repo";
115 unless($pass) {
117 open(H,$ENV{'HOME'}."/.cvspass") and do {
118 # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
119 while(<H>) {
120 chomp;
121 s/^\/\d+\s+//;
122 my ($w,$p) = split(/\s/,$_,2);
123 if($w eq $rr or $w eq $rr2) {
124 $pass = $p;
125 last;
126 }
127 }
128 };
129 }
130 $pass="A" unless $pass;
131 my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
133 die "Socket to $serv: $!\n" unless defined $s;
134 $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
135 or die "Write to $serv: $!\n";
136 $s->flush();
137 my $rep = <$s>;
139 if($rep ne "I LOVE YOU\n") {
141 $rep="<unknown>" unless $rep;
142 die "AuthReply: $rep\n";
143 }
144 $self->{'socketo'} = $s;
145 $self->{'socketi'} = $s;
146 } else { # local or ext: Fork off our own cvs server.
147 my $pr = IO::Pipe->new();
148 my $pw = IO::Pipe->new();
149 my $pid = fork();
150 die "Fork: $!\n" unless defined $pid;
151 my $cvs = 'cvs';
152 $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
153 my $rsh = 'rsh';
154 $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
155 my @cvs = ($cvs, 'server');
157 my ($local, $user, $host);
158 $local = $repo =~ s/:local://;
159 if (!$local) {
160 $repo =~ s/:ext://;
161 $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
162 ($user, $host) = ($1, $2);
163 }
164 if (!$local) {
165 if ($user) {
166 unshift @cvs, $rsh, '-l', $user, $host;
167 } else {
168 unshift @cvs, $rsh, $host;
169 }
170 }
171 unless($pid) {
173 $pr->writer();
174 $pw->reader();
175 dup2($pw->fileno(),0);
176 dup2($pr->fileno(),1);
177 $pr->close();
178 $pw->close();
179 exec(@cvs);
180 }
181 $pw->writer();
182 $pr->reader();
183 $self->{'socketo'} = $pw;
184 $self->{'socketi'} = $pr;
185 }
186 $self->{'socketo'}->write("Root $repo\n");
187 # Trial and error says that this probably is the minimum set
189 $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E F Checked-in Created Updated Merged Removed\n");
190 $self->{'socketo'}->write("valid-requests\n");
192 $self->{'socketo'}->flush();
193 chomp(my $rep=$self->readline());
195 if($rep !~ s/^Valid-requests\s*//) {
196 $rep="<unknown>" unless $rep;
197 die "Expected Valid-requests from server, but got: $rep\n";
198 }
199 chomp(my $res=$self->readline());
200 die "validReply: $res\n" if $res ne "ok";
201 $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
203 $self->{'repo'} = $repo;
204}
205sub readline {
207 my($self) = @_;
208 return $self->{'socketi'}->getline();
209}
210sub _file {
212 # Request a file with a given revision.
213 # Trial and error says this is a good way to do it. :-/
214 my($self,$fn,$rev) = @_;
215 $self->{'socketo'}->write("Argument -N\n") or return undef;
216 $self->{'socketo'}->write("Argument -P\n") or return undef;
217 # $self->{'socketo'}->write("Argument -ko\n") or return undef;
218 # -ko: Linus' version doesn't use it
219 $self->{'socketo'}->write("Argument -r\n") or return undef;
220 $self->{'socketo'}->write("Argument $rev\n") or return undef;
221 $self->{'socketo'}->write("Argument --\n") or return undef;
222 $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
223 $self->{'socketo'}->write("Directory .\n") or return undef;
224 $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
225 # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
226 $self->{'socketo'}->write("co\n") or return undef;
227 $self->{'socketo'}->flush() or return undef;
228 $self->{'lines'} = 0;
229 return 1;
230}
231sub _line {
232 # Read a line from the server.
233 # ... except that 'line' may be an entire file. ;-)
234 my($self) = @_;
235 die "Not in lines" unless defined $self->{'lines'};
236 my $line;
238 my $res="";
239 while(defined($line = $self->readline())) {
240 # M U gnupg-cvs-rep/AUTHORS
241 # Updated gnupg-cvs-rep/
242 # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
243 # /AUTHORS/1.1///T1.1
244 # u=rw,g=rw,o=rw
245 # 0
246 # ok
247 if($line =~ s/^(?:Created|Updated) //) {
249 $line = $self->readline(); # path
250 $line = $self->readline(); # Entries line
251 my $mode = $self->readline(); chomp $mode;
252 $self->{'mode'} = $mode;
253 defined (my $cnt = $self->readline())
254 or die "EOF from server after 'Changed'\n";
255 chomp $cnt;
256 die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
257 $line="";
258 $res="";
259 while($cnt) {
260 my $buf;
261 my $num = $self->{'socketi'}->read($buf,$cnt);
262 die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
263 $res .= $buf;
264 $cnt -= $num;
265 }
266 } elsif($line =~ s/^ //) {
267 $res .= $line;
268 } elsif($line =~ /^M\b/) {
269 # output, do nothing
270 } elsif($line =~ /^Mbinary\b/) {
271 my $cnt;
272 die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
273 chomp $cnt;
274 die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
275 $line="";
276 while($cnt) {
277 my $buf;
278 my $num = $self->{'socketi'}->read($buf,$cnt);
279 die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
280 $res .= $buf;
281 $cnt -= $num;
282 }
283 } else {
284 chomp $line;
285 if($line eq "ok") {
286 # print STDERR "S: ok (".length($res).")\n";
287 return $res;
288 } elsif($line =~ s/^E //) {
289 # print STDERR "S: $line\n";
290 } else {
291 die "Unknown: $line\n";
292 }
293 }
294 }
295}
296sub file {
297 my($self,$fn,$rev) = @_;
298 my $res;
299 if ($self->_file($fn,$rev)) {
301 $res = $self->_line();
302 return $res if defined $res;
303 }
304 # retry
306 $self->conn();
307 $self->_file($fn,$rev)
308 or die "No file command send\n";
309 $res = $self->_line();
310 die "No input: $fn $rev\n" unless defined $res;
311 return $res;
312}
313package main;
316my $cvs = CVSconn->new($opt_d, $cvs_tree);
318sub pdate($) {
321 my($d) = @_;
322 m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?#
323 or die "Unparseable date: $d\n";
324 my $y=$1; $y-=1900 if $y>1900;
325 return timegm($6||0,$5,$4,$3,$2-1,$y);
326}
327sub pmode($) {
329 my($mode) = @_;
330 my $m = 0;
331 my $mm = 0;
332 my $um = 0;
333 for my $x(split(//,$mode)) {
334 if($x eq ",") {
335 $m |= $mm&$um;
336 $mm = 0;
337 $um = 0;
338 } elsif($x eq "u") { $um |= 0700;
339 } elsif($x eq "g") { $um |= 0070;
340 } elsif($x eq "o") { $um |= 0007;
341 } elsif($x eq "r") { $mm |= 0444;
342 } elsif($x eq "w") { $mm |= 0222;
343 } elsif($x eq "x") { $mm |= 0111;
344 } elsif($x eq "=") { # do nothing
345 } else { die "Unknown mode: $mode\n";
346 }
347 }
348 $m |= $mm&$um;
349 return $m;
350}
351my $tmpcv = "/var/cache/cvs";
353sub getwd() {
355 my $pwd = `pwd`;
356 chomp $pwd;
357 return $pwd;
358}
359-d $git_tree
361 or mkdir($git_tree,0777)
362 or die "Could not create $git_tree: $!";
363chdir($git_tree);
364my $last_branch = "";
366my $orig_branch = "";
367my %branch_date;
368my $git_dir = $ENV{"GIT_DIR"} || ".git";
370$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
371$ENV{"GIT_DIR"} = $git_dir;
372unless(-d $git_dir) {
373 system("git-init-db");
374 die "Cannot init the GIT db at $git_tree: $?\n" if $?;
375 system("git-read-tree");
376 die "Cannot init an empty tree: $?\n" if $?;
377 $last_branch = $opt_o;
379 $orig_branch = "";
380} else {
381 -f "$git_dir/refs/head/$opt_o"
382 or die "Branch '$opt_o' does not exist.\n".
383 "Either use the correct '-o branch' option,\n".
384 "or import to a new repository.\n";
385 $last_branch = basename(readlink("$git_dir/HEAD"));
387 unless($last_branch) {
388 warn "Cannot read the last branch name: $! -- assuming 'master'\n";
389 $last_branch = "master";
390 }
391 $orig_branch = $last_branch;
392 # Get the last import timestamps
394 opendir(D,"$git_dir/refs/heads");
395 while(defined(my $head = readdir(D))) {
396 next if $head =~ /^\./;
397 open(F,"$git_dir/refs/heads/$head")
398 or die "Bad head branch: $head: $!\n";
399 chomp(my $ftag = <F>);
400 close(F);
401 open(F,"git-cat-file commit $ftag |");
402 while(<F>) {
403 next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/;
404 $branch_date{$head} = $1;
405 last;
406 }
407 close(F);
408 }
409 closedir(D);
410}
411-d $git_dir
413 or die "Could not create git subdir ($git_dir).\n";
414my $pid = open(CVS,"-|");
416die "Cannot fork: $!\n" unless defined $pid;
417unless($pid) {
418 my @opt;
419 @opt = split(/,/,$opt_p) if defined $opt_p;
420 exec("cvsps",@opt,"-x","-A","--cvs-direct",'--root',$opt_d,$cvs_tree);
421 die "Could not start cvsps: $!\n";
422}
423## cvsps output:
426#---------------------
427#PatchSet 314
428#Date: 1999/09/18 13:03:59
429#Author: wkoch
430#Branch: STABLE-BRANCH-1-0
431#Ancestor branch: HEAD
432#Tag: (none)
433#Log:
434# See ChangeLog: Sat Sep 18 13:03:28 CEST 1999 Werner Koch
435#Members:
436# README:1.57->1.57.2.1
437# VERSION:1.96->1.96.2.1
438#
439#---------------------
440my $state = 0;
442my($patchset,$date,$author,$branch,$ancestor,$tag,$logmsg);
444my(@old,@new);
445my $commit = sub {
446 my $pid;
447 while(@old) {
448 my @o2;
449 if(@old > 55) {
450 @o2 = splice(@old,0,50);
451 } else {
452 @o2 = @old;
453 @old = ();
454 }
455 system("git-update-cache","--force-remove","--",@o2);
456 die "Cannot remove files: $?\n" if $?;
457 }
458 while(@new) {
459 my @n2;
460 if(@new > 55) {
461 @n2 = splice(@new,0,50);
462 } else {
463 @n2 = @new;
464 @new = ();
465 }
466 system("git-update-cache","--add","--",@n2);
467 die "Cannot add files: $?\n" if $?;
468 }
469 $pid = open(C,"-|");
471 die "Cannot fork: $!" unless defined $pid;
472 unless($pid) {
473 exec("git-write-tree");
474 die "Cannot exec git-write-tree: $!\n";
475 }
476 chomp(my $tree = <C>);
477 length($tree) == 40
478 or die "Cannot get tree id ($tree): $!\n";
479 close(C)
480 or die "Error running git-write-tree: $?\n";
481 print "Tree ID $tree\n" if $opt_v;
482 my $parent = "";
484 if(open(C,"$git_dir/refs/heads/$last_branch")) {
485 chomp($parent = <C>);
486 close(C);
487 length($parent) == 40
488 or die "Cannot get parent id ($parent): $!\n";
489 print "Parent ID $parent\n" if $opt_v;
490 }
491 my $pr = IO::Pipe->new();
493 my $pw = IO::Pipe->new();
494 $pid = fork();
495 die "Fork: $!\n" unless defined $pid;
496 unless($pid) {
497 $pr->writer();
498 $pw->reader();
499 dup2($pw->fileno(),0);
500 dup2($pr->fileno(),1);
501 $pr->close();
502 $pw->close();
503 my @par = ();
505 @par = ("-p",$parent) if $parent;
506 exec("env",
507 "GIT_AUTHOR_NAME=$author",
508 "GIT_AUTHOR_EMAIL=$author",
509 "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
510 "GIT_COMMITTER_NAME=$author",
511 "GIT_COMMITTER_EMAIL=$author",
512 "GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
513 "git-commit-tree", $tree,@par);
514 die "Cannot exec git-commit-tree: $!\n";
515 }
516 $pw->writer();
517 $pr->reader();
518 # compatibility with git2cvs
520 substr($logmsg,32767) = "" if length($logmsg) > 32767;
521 $logmsg =~ s/[\s\n]+\z//;
522 print $pw "$logmsg\n"
524 or die "Error writing to git-commit-tree: $!\n";
525 $pw->close();
526 print "Committed patch $patchset ($branch)\n" if $opt_v;
528 chomp(my $cid = <$pr>);
529 length($cid) == 40
530 or die "Cannot get commit id ($cid): $!\n";
531 print "Commit ID $cid\n" if $opt_v;
532 $pr->close();
533 waitpid($pid,0);
535 die "Error running git-commit-tree: $?\n" if $?;
536 open(C,">$git_dir/refs/heads/$branch")
538 or die "Cannot open branch $branch for update: $!\n";
539 print C "$cid\n"
540 or die "Cannot write branch $branch for update: $!\n";
541 close(C)
542 or die "Cannot write branch $branch for update: $!\n";
543 if($tag) {
545 open(C,">$git_dir/refs/tags/$tag")
546 or die "Cannot create tag $tag: $!\n";
547 print C "$cid\n"
548 or die "Cannot write tag $branch: $!\n";
549 close(C)
550 or die "Cannot write tag $branch: $!\n";
551 print "Created tag '$tag' on '$branch'\n" if $opt_v;
552 }
553};
554while(<CVS>) {
556 chomp;
557 if($state == 0 and /^-+$/) {
558 $state = 1;
559 } elsif($state == 0) {
560 $state = 1;
561 redo;
562 } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) {
563 $patchset = 0+$_;
564 $state=2;
565 } elsif($state == 2 and s/^Date:\s+//) {
566 $date = pdate($_);
567 unless($date) {
568 print STDERR "Could not parse date: $_\n";
569 $state=0;
570 next;
571 }
572 $state=3;
573 } elsif($state == 3 and s/^Author:\s+//) {
574 s/\s+$//;
575 $author = $_;
576 $state = 4;
577 } elsif($state == 4 and s/^Branch:\s+//) {
578 s/\s+$//;
579 $branch = $_;
580 $state = 5;
581 } elsif($state == 5 and s/^Ancestor branch:\s+//) {
582 s/\s+$//;
583 $ancestor = $_;
584 $ancestor = $opt_o if $ancestor eq "HEAD";
585 $state = 6;
586 } elsif($state == 5) {
587 $ancestor = undef;
588 $state = 6;
589 redo;
590 } elsif($state == 6 and s/^Tag:\s+//) {
591 s/\s+$//;
592 if($_ eq "(none)") {
593 $tag = undef;
594 } else {
595 $tag = $_;
596 }
597 $state = 7;
598 } elsif($state == 7 and /^Log:/) {
599 $logmsg = "";
600 $state = 8;
601 } elsif($state == 8 and /^Members:/) {
602 $branch = $opt_o if $branch eq "HEAD";
603 if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) {
604 # skip
605 print "skip patchset $patchset: $date before $branch_date{$branch}\n";
606 $state = 11;
607 next;
608 }
609 if($ancestor) {
610 if(-f "$git_dir/refs/heads/$branch") {
611 print STDERR "Branch $branch already exists!\n";
612 $state=11;
613 next;
614 }
615 unless(open(H,"$git_dir/refs/heads/$ancestor")) {
616 print STDERR "Branch $ancestor does not exist!\n";
617 $state=11;
618 next;
619 }
620 chomp(my $id = <H>);
621 close(H);
622 unless(open(H,"> $git_dir/refs/heads/$branch")) {
623 print STDERR "Could not create branch $branch: $!\n";
624 $state=11;
625 next;
626 }
627 print H "$id\n"
628 or die "Could not write branch $branch: $!";
629 close(H)
630 or die "Could not write branch $branch: $!";
631 }
632 if(($ancestor || $branch) ne $last_branch) {
633 print "Switching from $last_branch to $branch\n" if $opt_v;
634 system("git-read-tree","-m","-u","$last_branch","$branch");
635 die "read-tree failed: $?\n" if $?;
636 }
637 if($branch ne $last_branch) {
638 unlink("$git_dir/HEAD");
639 symlink("refs/heads/$branch","$git_dir/HEAD");
640 $last_branch = $branch;
641 }
642 $state = 9;
643 } elsif($state == 8) {
644 $logmsg .= "$_\n";
645 } elsif($state == 9 and /^\s+(\S+):(INITIAL|\d(?:\.\d+)+)->(\d(?:\.\d+)+)\s*$/) {
646# VERSION:1.96->1.96.2.1
647 my $init = ($2 eq "INITIAL");
648 my $fn = $1;
649 my $rev = $3;
650 $fn =~ s#^/+##;
651 my $data = $cvs->file($fn,$rev);
652 print "".($init ? "New" : "Update")." $fn: ".length($data)." bytes.\n";
653 mkpath(dirname($fn),$opt_v);
654 open(F,"> ./$fn")
655 or die "Cannot create '$fn': $!\n";
656 print F $data
657 or die "Cannot write to '$fn': $!\n";
658 close(F)
659 or die "Cannot write to '$fn': $!\n";
660 chmod(pmode($cvs->{'mode'}), $fn);
661 push(@new,$fn); # may be resurrected!
662 } elsif($state == 9 and /^\s+(\S+):\d(?:\.\d+)+->(\d(?:\.\d+)+)\(DEAD\)\s*$/) {
663 my $fn = $1;
664 $fn =~ s#^/+##;
665 push(@old,$fn);
666 } elsif($state == 9 and /^\s*$/) {
667 $state = 10;
668 } elsif(($state == 9 or $state == 10) and /^-+$/) {
669 &$commit();
670 $state = 1;
671 } elsif($state == 11 and /^-+$/) {
672 $state = 1;
673 } elsif(/^-+$/) { # end of unknown-line processing
674 $state = 1;
675 } elsif($state != 11) { # ignore stuff when skipping
676 print "* UNKNOWN LINE * $_\n";
677 }
678}
679&$commit() if $branch and $state != 11;
680# Now switch back to the branch we were in before all of this happened
682if($orig_branch) {
683 print "DONE; switching back to $orig_branch\n" if $opt_v;
684} else {
685 $orig_branch = "master";
686 print "DONE; creating $orig_branch branch\n" if $opt_v;
687 system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
688 unless -f "$git_dir/refs/heads/master";
689}
690system("git-read-tree","-m","-u","$last_branch","$orig_branch");
692die "read-tree failed: $?\n" if $?;
693unlink("$git_dir/HEAD");
695symlink("refs/heads/$orig_branch","$git_dir/HEAD");
696